A:AnswerYes and no. XFinity cable is an Internet connection through a cable tied to your house. This operates through low Earth orbit satellites. Latency through Starlink is likely better (lower).
But yes, you can run everything through this your house now runs. You might need to make your current router an Access Point though.
A:AnswerMeaning this dish? If so, yes, it needs a clear and unobstructed view of the sky. A view North in North American is ideal.
The WiFi antenna built in it attached to the unit.
A:AnswerIf you pay full price AND are buying from an authorized retailer, yes.
The key is DO NOT buy from someone selling on eBay or similar. Those are NOT authorized retailers.
A:AnswerIt works just as well through glass, so you can put it inside on your RV dashboard, securing it with suction cups or removable adhesive strips.
A:AnswerMost cruise lines prohibit Starlink antennas on their ships to force you to purchase their internet. The Starlink will most likely get confiscated when you board.